A polymer not including a fluorescent dye is introduced into an electrophoresis flow channel and electrophoresis is performed (Steps S101, S103), so that a fluorescent dye in the electrophoresis flow channel is removed from the inside of the electrophoresis flow channel by the polymer. The fluorescent dye accumulated in the electrophoresis flow channel can be adhered to the polymer having a certain viscosity and removed from the electrophoresis flow channel. Accordingly, separation performance of a flow channel member can be recovered effectively.
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April 9, 2018
April 2, 2024
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